With no treaty in effect, nations could resume testing nukes at any time. This would cause a major arms race. The risk of nuclear terrorism or accidental launch make nuclear disarmament a very crucial goal for all nations. Japan wants to work with the United States on ending nuclear testing and building a world with no nukes.
A Republican former secretary of state and a Democratic "Jewish mother" may have just given us the strongest case yet for the nuclear agreement with Iran. The first is a pillar of the "realist" camp in the American national security establishment. The second is a rising star in the Democratic Party from a heavily Jewish district in South Florida. Together, they represent key constituencies whose support for the historic accord is critical to isolating right-wing opponents and preventing last-minute sabotage attempts. Together, they also lay out a compelling narrative of why the agreement is so important to American national security.